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May 19, 2015 - A Look At The New Commandlinefu
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Commands using free from sorted by
Terminal - Commands using free - 15 results
free && sync && echo 3 > /proc/sys/vm/drop_caches && free
echo "DISK:";df -Pl | grep -v "Filesystem" | awk '{print $5,$6}' ; echo "MEM:" ; free -mto | awk '{ print $1,$2,$3,$4 }'; echo "CPU:"; top -b -d1 -n1 | grep Cpu | awk '{print $2,$3,$4,$5,$6,$7,$8,$9}';echo "LOAD:"; cat /proc/loadavg
2014-09-29 12:43:52
User: injez
Functions: awk cat df echo free grep top
0

Monitoring system in one line :

DISK : disk space

MEM: memory ( mem , swap, Total)

CPU : all information about cpu activity

LOAD : load average

free -mh
free -m
watch -n 10 free -m
2014-01-04 10:10:15
User: Darkstar
Functions: free watch
-1

This command shows a high level overview of system memory and usage refreshed in seconds. Change -n 10 to you desired refresh interval.

free -m | awk '/cache:/ { printf("%d%\n",$3/($3+$4)*100)}'
free -m | awk '/cache:/ {print $4}'
2012-03-13 19:54:26
User: felixhummel
Functions: awk free
Tags: ram free
0

Does not output the word "shared" so you can easily store this number in a variable.

free -g
free -m | awk '/Mem/ {print $4}'
free -m | awk '/buffer/ {print $4}'
2010-06-27 23:30:27
User: DaveQB
Functions: awk free
Tags: ram free
3

Here we instead show a more real figure for how much free RAM you have when taking into consideration buffers that can be freed if needed.

Unix machines leave data in memory but marked it free to overwrite, so using the first line from the "free" command will mostly give you back a reading showing you are almost out of memory, but in fact you are not, as the system can free up memory as soon as it is needed.

I just noticed the free command is not on my OpenBSD box.

free -m | awk '/Mem/ {print $4}'
free -mto
free -m | awk '/Swap/ {print $4}'
2009-09-02 11:46:17
User: voyeg3r
Functions: awk free
-2

simple way to show free swap

free -b | grep "Swap:" | sed 's/ * / /g' | cut -d ' ' -f2
clear; for i in `cat thehosts` ; do ssh $i "cat uname -a ; /etc/redhat-release; cat /proc/cpuinfo | tail -n 25 | egrep '^processor|^model name' "; free ; df -h ;done